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(Almost) Everything you need to know about seismic design

Employment Features: Bridge Design Academy - Rotation Program - Construction Experience Available - Seismic Design - Who are we? - Do we just work?

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Fear not...if your educational background didn't cover seismic design or analysis. While a basic understanding of structure dynamics and the differences between linear and non-linear behavior are helpful, what you absolutely need to know is covered in the Bridge Design Academy. Furthermore, we have a seismic specialist in every design unit who can help you with OTJ (on-the-job) training. Most bridges entail modeling the bridge in order to run a three-dimensional linear dynamic analysis from your PC. An appropriate response spectrum for the bridge site is used, based on seismic history, distance to the nearest fault, and nature of the soil borings. Each bent (set of columns) is also modeled two-dimensionally, and "pushed" into its nonlinear range.


However, the devil is in the details. Once you learn about bar splices in seismic areas, bar extensions for seismic, what locations are vulnerable in shear and need extra stirrups, the importance of long bearing seats, and a few other details, the most important part of your job--safety, is nearly done.

photo of column embedment steel failure
drawing of column bending over